Improvement in deoxidizing ores



|.- ROGERS.

Ore Roaster.

1 No. 29,746. Patented Aug. 21, 1860;

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UNITED STATES PArENr OFFICE.

ISAAC ROGERS, OF NORTH HAVERSTRAW', NENV YORK, ASSIGNOR TO SAMUEL DASKAM, OF NEWV YORK CITY.

IMPROVEMENT IN DEOXIDIZING ORES.

Specification forming part of Letters Patent No. 29,746, dated August 21, 1860.

' T0 on whom it may concern.-

Be it known that 1, Isaac BocERs, of North Haverstraw, in the county of Rockland and State of New York, have invented, made, and applied to use certain new and useful Improvements in the Mode of Treating Iron Ore; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of my improvements, reference being had to the annexed drawings, making part of this specification, wherein- Figure 1 is a longitudinal section of my apparatus complete, and Fig. 2 is a cross-section of the same at the line 1 1 of Fig. 1.

Similar marks of reference indicate the same parts.

The nature of the said invention consists in the use of a revolving deoxidizing-cylinder heated to the required degree by the caloric from a reverberatory or other furnace, into which cylinder the ore is introduced in a pulverized state with a sufficient admixture of carbon to combine with the metallic oxide while heated, and mixed in said cylinder away from contact with the atmosphere, so as to deprive the ore of a portion of oxygen, that passesoff as a vapor combined with carbon, and the carbonated ore drops away from the end of said cylinder into a furnace, to be immediately melted.

a is the fire-place, of any usual character of reverberatory, smelting, or forge furnace.

b is the hearth of the same, and 2 2 are the doors, all of which parts are to be constructed in any ordinary or convenient manner.

3 is a flue leading from said'furnace to a chimney, c, fitted with any common damper, 4, to regulate the draft.

(Z is a chamber supported on columns 5 5, or in any other suitable manner, and said chamber d may be constructed of brick-work and sustained by tie-rods and bars 6 6, as usual.

7 7 are lines running in the lower part of the chamber d, on each side thereof, and fitted with openings 8 8, to pass the heat out of said flues into the chamber.

d and 9 are suitable doors or openings for observing the heat of the cylinder 6 within said chamber (7. The fiues 7 7 are connected to the flue 3, so that when the damper etis shut the heat will pass along said flues 7 7 and out into the chamber cl through the openings 8 8, to heat the same and the deoXidizing-cylinder e placed therein; and 14 is a flue to a second chimney, h, with a suitable damper, 15, so that the deoxidizing-ehamber can be heated the requisite amount, or the same cooled down by opening the damper 4 and closing the damper 15, when the heat from the furnace will pass off by the chimney c.

18 18 are dampers that may be used for regulating the amount of draft in the flues 7 7.

c is the metallic cylinder, supported by j ournals 10 and 11, that set in bearings extending from one side of the chamber (1 to the other, and resting on the tops of the end columns, 5 5, so as securely to receive the cylinder 6 and allow of its free rotation by means of power applied to the wheel or pulley f. The journal 11 is hollow, and should be so fitted that it can slide endwise in its bearing, to allow-for expansion under the degree of heat to which the cylinder 6 is subjected, and the said hollow journal opens into a hopper, g, and receives a feeding-screw, 12, driven by a pulley or wheel, 13, and extending into the interior of the cylinder 6, so that the carbon and iron ore in a pulverized state are passed through said hollow. journal into the cylinder 0, in which they are thoroughly mixed by the rotation of said cylinder, and passed gradually from one end to the other of the same by means of a helical or screw-formed division, 16, and the ore and carbon are passed away by an opening, 17, at the back end, into a hopper or chute, c, conducting the same to the hearth b below, upon which the mass is melted, puddled, or worked in any usual manner.

19 is a slide to. the chute i.

By the method which I adopt of fitting and working the cylinder e, it will be apparent that I exclude the atmosphere as much as possible, for the mass of pulverized ore and car bonin the hopper g prevents the access of air through the journal 11, and the operation of the heat on the mass of ore and carbon as it rolls down the lifting side of the cylinder while the same revolves is such as to bring the carbon in intimate contact with the metallic oxide and form a gaseous product, which, in escaping through the opening 17 also keeps away the atmosphere, the result of which is an almost perfect deoxidation of the ore and a partial carbonation of the same, so that it readily melts and can be worked in (the furnace below.

I do not limit myself to any particular character of smelting, reverberatory, or other furnace or forge fire, a b, as this may be of any desired construction.

I do not claim deoxidizing metallic ores by means of carbon in a closed vessel, as this is well known; but

WVhat I claim is 1. The revolving cylinder 0, fitted with the helical or screw-formcd divisions 16, to receive the metallic ore in a pulverized state and submit the same to heat and constant agitation by the revolution of the cylinder,wl1ile the ore is gradually passed from one end of the cylinder to the other by the division 16, as specified, the metallic ore being supplied through the hollow journal 11 or its equivalent.

2. The arrangement of the fines 7 7 in the chamber (Z with the fiues 3 and 14:, to heat the cylinder 6, when combined with the dampers 4 and 15, or their equivalents, to regulate the direction of the draft, and the consequent heat of the cylinder 6, as specified.

In witness whereof I have hereunto set my signature this 23d day of July, 1860.

ISAAC ROGERS.

W'itnesses:

LEMUEL WV. SERRELL, Tiros. GEO. IIAROLD. 

